Seat device for vehicle

Abstract

A seat device for a vehicle includes a seat cushion, a slow deformation portion, and a rearward-tilt member. An occupant in the vehicle is to be seated on the seat cushion. The slow deformation portion is disposed in at least a portion of the seat cushion and is configured in such a manner that deformation of the deformation portion proceeds as a result of a load to be applied continuously to the slow deformation portion. The rearward-tilt member is disposed in a load direction in an inner portion of the slow deformation portion. When the slow deformation portion is deformed by the load, the rearward-tilt member is tilted rearward from its position before the load is applied.

The invention claimed is: 
     
       1. A seat device for a vehicle, the seat device comprising:
 a seat cushion on which an occupant in the vehicle is to be seated; 
 a slow deformation portion that is housed in a recess, the recess formed in an upper surface of the seat cushion and disposed from a rear portion of the seat cushion in a front-rear direction of the vehicle to a center portion of the seat cushion, and of which slow deformation portion compression deformation to a load is configured to proceed belatedly compared with the seat cushion; and 
 a rearward-tilt member that is a plate-shaped elastic plate, and is arranged to be inside the slow deformation portion, the plate-shaped elastic plate extending in the vehicle width direction and configured to extend to be tilted rearward of the vehicle to the up-down direction, wherein, 
 when the slow deformation portion is deformed by the load, the rearward-tilt member is tilted rearward from a position before the load is applied. 
 
     
     
       2. The seat device for a vehicle according to  claim 1 , wherein, in a state in which no load is applied to the slow deformation portion, the rearward-tilt member is disposed to be tilted rearward. 
     
     
       3. The seat device for a vehicle according to  claim 2 , wherein the rearward-tilt member includes a plurality of rearward-tilt members, the rearward-tilt members being disposed side by side in a front-rear direction of the vehicle in an area in the seat cushion where the slow deformation portion is disposed. 
     
     
       4. The seat device for a vehicle according to  claim 3 , wherein the rearward-tilt members are disposed side by side in an area on a front side from a seating location in the seat cushion. 
     
     
       5. The seat device for a vehicle according to  claim 3 , wherein the rearward-tilt members are disposed side by side in an area in the seat cushion from a seating location to a portion on the front side of the seating location. 
     
     
       6. The seat device for a vehicle according to  claim 2 , wherein the rearward-tilt member has a shape in which a width in a vehicle width direction of the vehicle is larger than a thickness in a front-rear direction of the vehicle. 
     
     
       7. The seat device for a vehicle according to  claim 2 , wherein the rearward-tilt member disposed in the load direction in the inner portion of the slow deformation portion is curved or bent forward. 
     
     
       8. The seat device for a vehicle according to  claim 2 , wherein the rearward-tilt member disposed in the load direction in the inner portion of the slow deformation portion is curved or bent rearward. 
     
     
       9. The seat device for a vehicle according to  claim 2 , wherein the slow deformation portion comprises a low-resilience material. 
     
     
       10. The seat device for a vehicle according to  claim 2 ,
 wherein the slow deformation portion comprises a first slow deformation portion and a second slow deformation portion that overlap each other in the load direction, and 
 wherein the first slow deformation portion and the second slow deformation portion have mutually different deformation characteristics with respect to a load. 
 
     
     
       11. The seat device for a vehicle according to  claim 10 , wherein the rearward-tilt member disposed in the load direction in the inner portion of the slow deformation portion is curved or bent to follow an overlapping structure of the slow deformation portion. 
     
     
       12. The seat device for a vehicle according to  claim 1 , wherein the rearward-tilt member includes a plurality of rearward-tilt members, the rearward-tilt members being disposed side by side in a front-rear direction of the vehicle in an area in the seat cushion where the slow deformation portion is disposed. 
     
     
       13. The seat device for a vehicle according to  claim 12 , wherein the rearward-tilt members are disposed side by side in an area on a front side from a seating location in the seat cushion. 
     
     
       14. The seat device for a vehicle according to  claim 12 , wherein the rearward-tilt members are disposed side by side in an area in the seat cushion from a seating location to a portion on the front side of the seating location. 
     
     
       15. The seat device for a vehicle according to  claim 1 , wherein the rearward-tilt member has a shape in which a width in a vehicle width direction of the vehicle is larger than a thickness in a front-rear direction of the vehicle. 
     
     
       16. The seat device for a vehicle according to  claim 1 , wherein the rearward-tilt member disposed in the load direction in the inner portion of the slow deformation portion is curved or bent forward. 
     
     
       17. The seat device for a vehicle according to  claim 1 , wherein the rearward-tilt member disposed in the load direction in the inner portion of the slow deformation portion is curved or bent rearward. 
     
     
       18. The seat device for a vehicle according to  claim 1 , wherein the slow deformation portion comprises a low-resilience material. 
     
     
       19. The seat device for a vehicle according to  claim 1 ,
 wherein the slow deformation portion comprises a first slow deformation portion and a second slow deformation portion that overlap each other in the load direction, and 
 wherein the first slow deformation portion and the second slow deformation portion have mutually different deformation characteristics with respect to a load. 
 
     
     
       20. The seat device for a vehicle according to  claim 19 , wherein the rearward-tilt member disposed in the load direction in the inner portion of the slow deformation portion is curved or bent to follow an overlapping structure of the slow deformation portion. 
     
     
       21. The seat device for a vehicle according to  claim 1 , wherein the rearward-tilt member is embedded within material of the slow deformation portion. 
     
     
       22. The seat device for a vehicle according to  claim 1 , wherein the slow deformation portion is comprised of slow deformation foam.